boarding card vs laissez passer

boarding card and laissez passer both are nouns.

Word	Noun	Adjective	Verb	Adverb
boarding card	Yes	No	No	No
laissez passer	Yes	No	No	No

As nouns, laissez passer is a hypernym of boarding card; that is, laissez passer is a word with a broader meaning than boarding card:

boarding card: a pass that allows you to board a ship or plane
laissez passer: a document indicating permission to do something without restrictions

Other hypernyms of boarding card include pass.

boarding card (noun)	laissez passer (noun)
a pass that allows you to board a ship or plane	a document indicating permission to do something without restrictions